Data items in the EM_SINGLE_PARTICLE_ENTITY category provide the details of the symmetry for a single particle entity type.
_em_single_particle_entity.entry_id 1EG0 _em_single_particle_entity.symmetry_type "ASYMMETRIC"
_em_single_particle_entity.entry_id 2ZLE _em_single_particle_entity.symmetry_type "MIXED SYMMETRY"